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Message-ID: <cover.1693386602.git.pstanner@redhat.com>
Date: Wed, 30 Aug 2023 15:45:51 +0200
From: Philipp Stanner <pstanner@...hat.com>
To: Kees Cook <keescook@...omium.org>,
Andy Shevchenko <andy@...nel.org>,
Eric Biederman <ebiederm@...ssion.com>,
Christian Brauner <brauner@...nel.org>,
David Disseldorp <ddiss@...e.de>,
Luis Chamberlain <mcgrof@...nel.org>,
Siddh Raman Pant <code@...dh.me>,
Nick Alcock <nick.alcock@...cle.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Zack Rusin <zackr@...are.com>
Cc: VMware Graphics Reviewers <linux-graphics-maintainer@...are.com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
kexec@...ts.infradead.org, linux-hardening@...r.kernel.org,
Philipp Stanner <pstanner@...hat.com>
Subject: [PATCH 0/5] Introduce new wrappers to copy user-arrays
Hi!
David Airlie suggested that we could implement new wrappers around
(v)memdup_user() for duplicating user arrays.
This small patch series first implements the two new wrapper functions
memdup_array_user() and vmemdup_array_user(). They calculate the
array-sizes safely, i.e., they return an error in case of an overflow.
It then implements the new wrappers in two components in kernel/ and two
in the drm-subsystem.
In total, there are 18 files in the kernel that use (v)memdup_user() to
duplicate arrays. My plan is to provide patches for the other 14
successively once this series has been merged.
P.
Philipp Stanner (5):
string.h: add array-wrappers for (v)memdup_user()
kernel: kexec: copy user-array safely
kernel: watch_queue: copy user-array safely
drm_lease.c: copy user-array safely
drm: vmgfx_surface.c: copy user-array safely
drivers/gpu/drm/drm_lease.c | 4 +--
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 4 +--
include/linux/string.h | 42 +++++++++++++++++++++++++
kernel/kexec.c | 2 +-
kernel/watch_queue.c | 2 +-
5 files changed, 48 insertions(+), 6 deletions(-)
--
2.41.0
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